Self-dumping mining-tub.



O. BELPORD.

SELF DUMPING MINING TUB.

APPLICATION FILED JUNE 5, 1912 1,039, Patented 0013.1,1912.

2 SHEETS-SHEET 1.

Inventor Attorneys uouzunm PLANDGRAPH C0,,\\'ASH]NGTON, 1). L.

O. BELFORD.

SELF DUMPING MINING TUB. APPLICATION IIILBD JUNE 5, 1912.

Patented 00k 1, 1912.

2 SHEBTS*SHEET 2.

dwarfia/fbrd,

Inventor Attorneys UNITED STATES PATENT OFFICE.

OSCAR BELFORD, F GOLCONDA, ILLINOIS.

SELF-DUMPING MIN ING-TUB.

T 0 all whom it may concern:

Be it known that I, OSCAR BELFORD, a citizen of the United States, residing at Golconda, in the county of Pope and State of Illinois, have invented a new and useful Self-Dumping Mining-Tub, of which the following is a specification.

This invention relates to self dumping i mining tubs, its object being to provide means whereby, when the tub is hoisted to a predetermined position, a trap door will swing downwardly into position under the tub so as to close the shaft of the mine.

A further object is to provide means whereby the tub, when lowered subsequently to the closing of the shaft, will be inverted automatically so as to discharge its contents beyond the mine shaft.

Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

present invention, the position'of the tub,

while dumping, being indicated by dotted lines and the position of the trough, while raised, being likewise indicated by dotted lines. Fig. 2 is a front elevation of the apparatus. Fig. 3 is a section through a portion of the apparatus, said section being taken on the line AB Fig. 2.

Referring to the figures by characters of reference 1 designates a tower of any suitable construction and which is adapted to be erected over the mine shaft, the lower end of the tower being normally closed by a trap door 2 hingedly connected, at its lower end, to one side of the tower as shown at 3 so as thus to be capable of swinging upwardly to the position indicated by dotted lines in Fig. 1 in order to uncover the mine shaft. A bail 4 is mounted within the tower and un- Specification of Letters Patent.

Application filed .Tune 5, 1912.

Patented Oct. 1, 1912.

Serial No. 701,842.

der the door 2 and the intermediate portion of this bail carries one or more anti-friction devices 5 designed to bear upwardly upon the lower surface of the door. The sides of the bail are connected, by lifting rods 6, to a cross-head 7 slidably mounted upon guides 8 extending vertically along the sides of the tower 1. This cross head normally rests upon supporting strips 9 so that the bail 4 is thus held normally in the position shown in full lines in Fig. 1. A hook 10 is pivotally connected to and suspended from the cross head 7 and is adapted to engage a platform 11 mounted on a frame 12 adapted to slide between the guides 8. A cord 13 is connected to the hook 10 and extends around the guide sheaves 14 and thence downwardly to a point where it can be readily manipulated by the attendant. Another sheave 15 is mounted in the upper portion of the tower and supports a hoisting cable 16 one end portion of which extends downwardly through the cross head 7 and through the platform 11 and is secured to a block 17 connected to the bail 18 of the tub 19. This tub has a ring 20 below the bot-tom thereof and connected thereto by means of arms 21.

An arm 22 extends from the upper portion of the tower and supports a bracket 23 constituting a stop, said bracket having a forked upper end, as shown at 24. A lever 25 is fulcrumed, as at 26, upon the arm 22 and the lower arm of this lever extends downwardly and terminates in a hook 27 while the upper arm of the lever has an extension 28 disposed at an angle thereto and carrying a weight 29. This weighted extension 28 normally rests in the forked bracket 24 but in order to hold it out of normal position, a bar 30 is pivotally connected to the lower arm of lever 25 and slides within a guide hanger 81 provided with a transverse stop pin 32. A notch 33 is formed in the bar 30 so that, when the weighted extension 28 is elevated and the lower arm of lever 25 is swung outwardly, as indicated by dotted lines in Fig. 1, the notched portion of the bar 30 will engage the pin 32 and thus hold the parts against further movement. It will be noted that the bar 30 extends over the cross head 7 and that said cross head has an upstanding projection 34 directly under and adapted to move upwardly into contact with the bar 30.

It is to be understood that, under normal conditions, the platform 11 is in engagement with and supported by hook 10 and the door 2 is in closed or inclined position with the hook 27 extending between it and the tub, as shown in Fig. 1. By paying out the cable 16, the tub 19 will be lowered, thus causing the ring 20 to engage the hook 27. The tub and hook will therefore be caused to swing downwardly and outwardly by gravity until the tub is brought to an inverted position directly under the fulcrum 26, whereupon the contents of the tub will be discharged into a wagon car, or other receptacle located close to the shaft. During this outward swinging movement of the hook 27 and its lever 25, the bar 30 will be drawn longitudinally so as to cause the notched portion 33 to slip over the pin 32. During the dumping of the tub the lever 25 occupies the position shown by the dotted lines at a in Fig. 1. After the contents of the tub have been discharged, the cable 16 can be taken up so as to elevate the tub 19. Said tub will, during this movement, first be shifted so as to bring its top uppermost after which it will be lifted out of engagement with the hook 27 and will swing back into position above the closed door 2. Lever 25 will swing inward toward the tower 1 until the notched portion 33 engages pin 32 whereupon it will be heldin the position shown by dotted lines at Z) in Fig. 1. By continuing the upward movement of the tub, the block 17 will be caused to strike the frame 12 and a slight upward movement of the platform 11 and cross head 7 will result in swinging the bail 4 upwardly, this operation being effected through the bar 6. During this upward movement of the bail, the anti-friction device 5 will roll along the bottom face of the door 2 and cause the door to swing upwardly against a stop 35 mounted on the tower 1. As the door moves past a dead center before coming against the stop 35, it will be apparent that the same will be held by gravity in raised position after thus being elevated. The position of the door when thus raised has been shown by dotted lines in Fig. 1. The upward movement of the cross head 7, at this time, should not be sufficient to bring the projection 3 1 against the bar 30. After the trap door 2 has been raised as described, the tub 19 can be lowered into the shaft and, after being filled, can again be raised. During this elevation of the tub, the block 17 is caused to strike the frame 12 and the cross head 7 is thus raised a sufiicient distance to bring the projection 34: against the bar 30. Said bar will thus be elevated and become disengaged from the pin 32. Weight 29 will promptly move downward, thereby shifting bar 80 longitudinally and causing the hook 27 to press against the door 2 and swing it down to closed position. The hook will therefore be held above the closed door and below and in the path of the ring 20 so that, upon lowering the tub, said ring will engage the hook and swing downwardly and outwardly therewith, the tub, during this movement, becoming inverted so as to discharge the contents while the lever 25 is in the position shown at a in Fig, 1. Whenever desired, the cord 18 can be actuated so as to disengage the hook 10 from the platform 11 whereupon said platform can'be caused to travel with the tub into and out of the shaft.

hat is claimed is 1. Hoisting apparatus including a vertically movable receptacle, a door normally under the receptacle, means operated by the partial elevation of the receptacle for opening the door from under the receptacle, a 5

door closing element, means operated by the receptacle when lowered above the closed door for shifting and setting said element, and means operated by the complete elevation of the receptacle for releasing the element to return the door to closed'position.

2. Hoisting apparatus including a vertically movable receptacle, a door normally under the receptacle, means operated by the partial elevation of the receptacle for shift ing the door from under the receptacle, a door closing element movable by the receptacle when lowered above the closed door, means for holding said element when shifted, and means operated by the complete elevation of the receptacle for releasing said element to return the door to normal pos1- tion.

8. Holstlng apparatus lncludmg a receptacle, a door normally under the receptacle,

means operated by the partial elevation of the receptacle for shifting the door from under the receptacle, a door returning element normally extending under the receptacle and shiftable out of normal position by the receptacle for shifting the door from under the receptacle, a door returning element normally extending under the receptacle and shiftable out of normal position by the receptacle when lowered above the closed door, means for holding said element,

when shifted, means operated by the coinplete elevation of the receptacle for releasing said element to return the door to normal position, and means upon the receptacle for engaging said element to swing ment having an engaging portion normally extendlng under the receptacle, means upon the receptacle for engaging and swinging said element during the lowering of the receptacle to swing and dump the receptacle, means for holding said element against complete return movement when released from the receptacle, and means operated by the complete elevation of the receptacle for releasing said element to return the door to position under the receptacle.

6. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, means operated by the partial elevation of the receptacle for shifting the door from under the receptacle, a lever movable out of normal position by the receptacle when lowered above the closed door, means for holding the lever out of normal posit-ion, means operated by the complete elevation of the receptacle for shifting said holding means to release the lever, and means for automatically actuating the released lever to return the door to normal position.

7. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, means operated by the partial elevation of the receptacle for shifting the door from under the receptacle, a lever movable out of normal position by the receptacle when lowered above the closed door, means for holding the lever in the position to which it is moved, means operated by the complete elevation of the receptacle for shifting said holding means to release the lever, means for automatically actuating the released lever to return the door to normal position, and cooperating means upon the receptacle and lever for coupling said receptacle to the lever during said lowering of the receptacle.

8. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, a cross head shiftable by the receptacle, means operated by the partial elevation of the cross head for moving the door out of normal position, a door returning element movable out of normal position by the receptacle when lowered above the closed door, means for holding said element when shifted and means operated by the cross head when completely elevated, for shifting said fastening means to release the element and return the door to normal position.

9. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, across head adapted to be actuated by the receptacle, means operated by the partial elevation of the cross head for shifting the door out of normal position, a door returning lever shiftable out of normal position by the receptacle when lowered above the closed door, a holding bar movable with the lever, "means cooperating with the bar 'for holding the lever against movement subsequent to being shifted by the receptacle, means operated by the complete elevation of the cross head for disengaging the bar to release the lever, and means for automatically shifting the released lever to move the door to normal position.

10. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, a cross head adapted to be actuated by the receptacle, means operated by the partial elevation of the cross head for shifting the door out of normal position, a door returning lever shiftable out of normal position by the receptacle when lowered above the closed door, a holding bar movable with the lever, means cooperating with the bar for holding the lever against movement subsequent to being shifted by the receptacle, means operated by the complete elevation of the cross head for disengaging the bar to release the lever, means for automatically shifting the released lever to move the door to normal position, means upon the lever for normally extending under the receptacle, and means cooperating therewith and upon the receptacle for dumping said receptacle.

11. Hoisting apparatus including a receptacle, means for raising and lowering the same, a door normally under the receptacle, a cross head adapted to be actuated by the receptacle, means operated by the partial elevation of the cross head for shifting the door out of normal position, a door returning lever shiftable out of normal position by the receptacle when lowered above the closed door, a holding bar movable wit-h the lever, means cooperating with the bar for holding the lever against movement subsequent to being shifted by the receptacle, means operated by the complete elevation of the cross head for disengaging the bar to release the lever, means for automatically shifting the released lever to move the door to normal position, a platform interposed between the receptacle and the cross head, and means for detachably connecting said platform into the cross head.

12. Hoisting apparatus including a trap door, a receptacle normally thereabove, a hooked lever normally extended under the receptacle, a ring on the bottom of the receptacle for engaging the lever, when the receptacle is lowered, to invert the receptacle and swing the lever and receptacle out of normal as my own, I have hereto aflixed my signapositlon, means for holding the lever out of ture in the presence of two Witnesses. normal position, and separate means operated by the raising of the receptacle to dif- OSCAR BELFORD' ferent heights, for opening the door and for Witnesses: releasing the lever. W. A. XVHITESIDE,

In testimony that I claim the foregoing RUDOLPH WHITESIDE.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

